Note 17 - Income Taxes - Reconciliation of Income Tax Expense Computed at Statutory Federal Income Tax Rate to Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Tax at statutory federal rate	$ 1,877	$ 1,205
Tax exempt interest income	(52)	(49)
Tax exempt insurance income	(92)	(155)
State income tax, net of federal benefit	48	21
Merger expenses		162
Other	(1)	30
Deferred tax asset re-measurement
	$ 1,780	$ 1,214